linux-kernel - Re: Oops on arm pxa270 2.6.22

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Date:	Thu, 19 Jul 2007 14:04:05 +0300
From:	Mike Rapoport <mike@...pulab.co.il>
To:	Rok Markovic <kernel@...ardia.eu>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	linux-arm-kernel@...ts.arm.linux.org.uk
Subject: Re: Oops on arm pxa270 2.6.22

Rok Markovic wrote:
> Hi
> 
> I would like to ask what could be a problem or how could I start 
> debuging it.
> My board is cm-x270 from compulab and it successfully boot until it should
> start init from busysbox. I get the folowing report.
> 
> environment:
> pxa270
> 128Mb RAM
> network boot
> gcc 3.4.5 softfloat
> 
> 
> Linux image detected in memory at 0xA0100000, booting...

[snip]

> pxa2xx-fb: probe of pxa2xx-fb failed with error -22
> Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing disabled

[snip]

> RAMDISK driver initialized: 4 RAM disks of 4096K size 1024 blocksize
>     bootserver=0.0.0.0, rootserver=192.168.10.124, rootpath=
> Looking up port of RPC 100003/2 on 192.168.10.124
> Looking up port of RPC 100005/1 on 192.168.10.124
> VFS: Mounted root (nfs filesystem).
> Freeing init memory: 108K
> Unable to handle kernel NULL pointer dereference at virtual address 
> 00000004
> pgd = c0004000
> [00000004] *pgd=00000000
> Internal error: Oops: f5 [#1]
> Modules linked in:
> CPU: 0    Not tainted  (2.6.22-cm-x270 #2)
> PC is at init_dev+0x38/0x5b8
> LR is at tty_open+0xf8/0x33c
> pc : [<c0135dd8>]    lr : [<c0136450>]    psr: 60000013

[snip]

> 3fe0: 00000000 00000000 00000000 c0423ff8 c003c9e8 c0008b30 e1a01007 
> ebfd4ec0
> Backtrace:
> [<c0135da0>] (init_dev+0x0/0x5b8) from [<c0136450>] (tty_open+0xf8/0x33c)
> [<c0136358>] (tty_open+0x0/0x33c) from [<c0088600>] 
> (chrdev_open+0x114/0x174)
> r8:c04e0d20 r7:00000000 r6:00000000 r5:c048f76c r4:c02e5c3c
> [<c00884ec>] (chrdev_open+0x0/0x174) from [<c00847d0>] 
> (__dentry_open+0x188/0x228)
> r8:c0531c80 r7:c04ae364 r6:c00884ec r5:c048f76c r4:c04e0d20
> [<c0084648>] (__dentry_open+0x0/0x228) from [<c00848a4>] 
> (nameidata_to_filp+0x34/0x4c)
> [<c0084870>] (nameidata_to_filp+0x0/0x4c) from [<c0084908>] 
> (do_filp_open+0x4c/0x50)
> r4:00000002
> [<c00848bc>] (do_filp_open+0x0/0x50) from [<c0084c48>] 
> (do_sys_open+0x5c/0xec)
> r5:00000000 r4:00000002
> [<c0084bec>] (do_sys_open+0x0/0xec) from [<c0084cfc>] (sys_open+0x24/0x28)
> [<c0084cd8>] (sys_open+0x0/0x28) from [<c0023300>] (init_post+0x2c/0xfc)
> [<c00232d4>] (init_post+0x0/0xfc) from [<c0008c80>] 
> (kernel_init+0x15c/0x2bc)
> r4:c02afed8
> [<c0008b24>] (kernel_init+0x0/0x2bc) from [<c003c9e8>] (do_exit+0x0/0x86c)
> Code: e3a03000 e5823000 059030b8 e1a06000 (07935107)
> Kernel panic - not syncing: Attempted to kill init!

I think you have conflict between PXA serial and 8250 drivers. Make sure you use 
only one of them.
If you need to use PCMCIA serial cards, please see 
http://lists.arm.linux.org.uk/pipermail/linux-arm-kernel/2007-July/040604.html


-- 
Sincerely yours,
Mike.

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